Paper boring and slotting machine



Nov. 21,1944. J. w. LEE ET AL I PAPER BORING AND SLOTTING MACHINE FiledFeb. 14, 1941 6 Sheets-Sheet 1 Nov. 21, 1944. J, w. LEE ET AL 2,363,255

PAPER BORING AND SLOTTI-NG MACHINE Filed Feb. 14, 1941 s Sheets-Sheet 2MTomeb Nov. 21, 1944. I .L w. LEE Emu.

v v PAPER BORING AND SLOTTING MACHINE 6 Sheets-Sheet 3 Filed Feb. 14,1941 \e Lg: I Tvumam fiygeb wwgmm M Nov- 21, 1944. J. w. LEE EIAL2,353,255

PAPER BORING Am) SLOT'iING MACHINE Filed Feb. 14, 1941 6 Sheets-Sheet 4Nov. 21, 1944. J. w. LEE ETAL PAPER BORING AND SLOTTING MACHINE 6Sheets-Sheetfi Filed Feb. 14, 1941 dames Wedgb L e.

Afi Tngg Nov. 21, 1944. J. w. LEE El'AL PAPER BORING AND SLOTTINGMACHINE Filed Feb. 14, 1941 6 Sheets-Sheet 6 Nhmerbs:

Patented Nov. 21-, 1944 'v g I sT TF.

attains .-Mich,,a corporation or Michigan Application February 14.,194'1i ,s ri

ai-Nole'zsmr 8 Claims. (01. 164 86)" This invention relates to .a paperdrilling and verticalsectionat theiront'fcentralportion of the slottingmachinegfor the simultaneous drilling of holes through paper; and withthe slitting or slotting of the paper outwardifrom the holes drilled. toan adjacent edge jthere-ofg, said slots thereby produced beingof,,difierent forms, and

which are produced in their different forms by machine showing thepaperadril land the cutters forl'the'fs'lots inside elevation.

means of different interchangeable cutters, or by.

rearranging and changing the..position of the-cutting blades wherebysubstantially any; ofv the well-knownand accepted types of slots ornotches cut in the edges of the paper may be produced. There, hasheretoforev been issued a patent having No. 2,029,624, relating to anattachmentfo'r paper drilling machines by. means-of 'whichlslots havingparallel sides .may ,be produced leading from the holes which have' beendrilled. to. the

edges of the paper. ,'In our invention where the.

paper is to be drilled and slotted; 'theoperation of drilling andslotting takes'placesimultaneously without thenecessitygenerally-ofperforming after the other .as in the above oneoperation patent.

, It is a primary drilling and slotting of ,the-.paper.whic h can bespect .toeach.

I object. and purpose of lthe pres V ent invention to provide-a verypractical and attached to drilling machines of the character g shown,forexarnple in said patent to which reference ismade, or-used withthestructureshOWn in the United StatesPat'entNo, 2,173,817, issuedremoving the small .pieces'iof paper out from {the paper sheets when anyslotting thereof is performed, getting themimmediately, out of-the way Iand thereby preventing any interference with the operations of themachine;

An understanding of the: invention and the 3 .construction whichembodies the same. may be had from the following descriptiQn taken' incon- .nection with the which:

i Fig. I is a partial vertical section and sid aa. e vation of themachine equipped with our invenaccompanying drawings, in 1 tion, thesection being from front to rear of the I.

machine and substantially on the plane of line I-I of Fig. 2, looking inthe direction indicated by the arrows.

Fig. 2 is a fragmentary verticalsection sub stantially at right anglesto that shown in Fig. 1.- I

Fig. 3.is a fragmentary plan view of the table and the back andendgauges of thejmachine.

saidpsiittih cutters;

'. through.- I

Fig. 51s a horizontal section substantially on theiplane of line 5+5ofFig'h4.

Fig. 6 is a somewhat enlarged perspective view v of 'on'e of the slotcutting attachments which 'may be used with the machine;

F'g. 's an underpl VIBW thereof. v i a cuttersadjusted to: I

di'fie'rent-Iposition with reuppers U .Figs."10"and. 11 la derplan viewsshowing thft'he cutter'knives in differentp-ositionsg m 2 isjannde'iiiian view, .01 a still further form of fcutter 'for cuttingwhat'isknown as the Kalamazoo notch or slot in paper.-

Fig."13 is a central vertical section there- Fig. 14 is a gmentay at.showing the drilling hole and. communicating 's'lotcutin the paper withthey cutters in the-positionshown in Fig. 7. Fig. .1-5 is a similar Viewwith thefcutters ad:

dusted as in Fig. 8.

. Fig '16 j is a. similar yivvf showing the hole drilled vand a., s'lotto. one sidewof the diameter of such hole and as produced with aslitting. attachmentasshown -inlFig .9; with the cutter adjustedto'oneside'il I V Fig; Q17 is a, View similar. to Fig. 1d wherein theslot has :been'scompleted by a second .slit. spaced from and paralleltothe firstsone, thatis, with the cutter'adjustedEtdtheopposite side, thetwo and .1.::

[1Fig.5l8.isa-iragmentary plan of an edge portion-oi1 apaper sheet witha Kalamazoo notch such as is" produced by the cutter shown in Fig. 12.

i Fig. ,19 is a summation, with parts broken away, of.'a"power-.,operated (drilling machine as illustratedin said Patent2,173,817, with the paper drilling and slotting, mechanism appliedthereto.. V

ti'oniof.the hydraulicpowermechanism. a

Fig. 21 is a fragmentary longitudinal section Fig; 20 is {anenlargedfragmentary side elevathrough'the hydraulic mechanism shown in Fig.

20 and i v I Fig. 22 is an enlarged partial elevation and iongitudinalsection 'oithe controlvalve of the hydrauli-c mechanism." I

.Like reference 'characters refer to like parts in i the different.figure s'of the drawings.

I .Fig. 4 is a somewhat .enlarged fragmentary E Ih'e paperg-drillingmachinefwith which this.

'nderplan viewshowing the I View ora slitting tater.

ositions oi the cuttei sbeing-shown in Figs. 10

invention is concerned is similar in many respects to structure shown inthe previously recited patents.

A lower supportin and covered housing I has above it an immediate tablesupport 2 on which a horizontal table 3 is mounted, it having a recessin which a wooden plug 4 is inserted to come directly below the lowerends of the drill and the slotting cutters. The sheets of paper, in apack 5 of superimposed sheets, are located upon the upper side of thetable 3 with the edge portions thereof which are to be drilled and cutlocated over the block 4. i v

A head 6 for carrying the drill, cutters and the motor for driving thedrill is adjustably supported on two spaced apart vertical posts 1 whichI are normally lifted to an upper position by compression springs 8.Such posts 1 may be pulled in a downward direction by a foot pedal 9through a link connection at. l0 whereby .on downward pressure upon thepedal 9 the post 1 and the drill and cutters carried thereby will I bemoved in a downward direction. For purposes of illustration, thesimplefoot pedal method of moving the drill and cutters ina downward directionis shown, but it is to be understood that the power operated mean'sshownin the United States Patent.No. 2,173,817, issued September 26, 1939,and hereinillustrated in Figs. 19, 20, 21 and 22, for moving the .drillin a downward direction will preferably be. used when si- .multaneousdrilling and cutting of the .slotsoccurs. Insofar as th-eipresentinvention, isconcerned, any means, whether a power means v or one whichis operated directly by the. .weight of the operator on a foot pedalsuchas that indicated at 9 may. be .used,,it being requisite only that asufiicient force be provided for the drill and cutter knivestopassthrough the paper pack.

As in the previous patents referred to, vthe drill is driven by anelectric motor ll carried at one end of the head 6 which, through an.interposed endless belt I2, drives a verticaldrill spindle l3 at thelower end of which (Fig. 4) is a drill receivin chuck M. The hollowpaper drill has a shankat its upper end adapted to be received in saidchuck I 4. The usual spring actuated presser foot l6 carried byvertically reciprocable rods" l1 and yieldingly moved in a downwarddirection by coiled springs l8, the rods being mounted for up and downmovement on a fixture {9 located at the forward portion of the head 6isused thev same as before, to exert a pressure upon thfi pack 5 to holdthe paper sheet while the drilling and cutting operations ar beingperformed, and permit the drill and cutters to move downwardly while the.presser foot I6 stays in a fixed position against the .uppermost sheetof the paper pack.

The pack 5 of paper sheetsis located at its inner or rear edgefagainstabackgauge consisting, of .two alined sections, (Fig. 3), the adjacent,ends: of which arespaced a short distance apart and, throughright anglepositioned brackets 2| connectwith a short central section 22.1ooated adistance back of the sections, of the gauge. There is, therefore, leftback of the rear edges of the pack 5 an openingor space 23, as shown inFig.3. An end gauge .24 which .may be adjusted to difi'erent selectedpositions on the back gauge through the use of the different length rods25, comes against one of the edges of the pack 5. It is not necessary todescribe this end gauge and the method of operation in detail as it isfully disclosed in Patent No. 1,928,383, issued September 26, 1933. Itis enough to say that the pack 5 of paper sheets is held in properposition with reference to the drill by engaging against the back gaugeat its rear edge and at the end gauge at one side edge, and that thesheet pack may be moved to different positions with respect to the backgauge through the different selected positions with respect to the backgauge through the different selected positions which may be set for endgauge 24, as fully described in said Patent No. 1,928,- 383. The openspace at 23 is immediately back of the wood block 4 and the drill andcutters as hereafter described are moved downwardly to and in engagementwith the paper sheets 5 and through themin front of and partly withinthe front po-rtion'of the space at 23 and drill and cut openings andcommunicating slots in the paper at several predetermined .and selectedpoints in the length of the rear edge of the pack 5 of paper sheets. U

A circular opening ismade through the table 3 immediately below the rearportion of said open space 23. A vertical tube 26 (Figs. 1 and 2) isinserted at its upper end in said opening, ex tends through the support2 and at its lower end\passes through the/upper side of the housing I,communicating with a fan housing 21,

\ the sheets of paper when the slots are cut through a suction draft ofair which moves downwardly through the tube 25 and is expelled togetherwith the paper parts carried in the current of air at the end ofthehousing 21.

A supporting casting 30 (Figs. 1 and 4) is bolted to the underside ofthe head 6 at the front end of'which the fixture l9 previously describedis adjustably supported. At the front portion and'at the under side ofthe supporting casting 30 a block 3| is adjustably mounted having acircular opening 32 therethrough, larger in diameter than the diameterof thechuck I 4, the drill l5 extending through said. opening. The block32 .has slotted Wings 33 at its side through which set screws 34 pass,threading upwardly into the casting 30 and permitting a range of forwardand back adjustment. The block 3| has vertical guide. slots 35 (Fig. 5)at its rear side, in which the, upper ends of several interchangeablecutter assemblies may be adjustably guided in a vertical direction.

The cutter assembly includes a supporting body 36, vertically slottedbetween its edges at 31, and through which set screws 38 pass and threadinto the block 3|, guide ribs 39 extending through guide grooves 35.asshown in Fig. 5.

Thelower end portion of the block 36 is milled centrally to make anopening or re'cess having annularly positioned sides, one at the innerside of eachof the integral projections 4!! at the lower end portion ofthe said block 36., In the open space provided. and indicated at 4|,cutters having bodies 42 are adapted to be positioned and clamped inplace, against the inclined sides of the opening at 4! by screws whichpass through the parts 49 through openings in the bodies of the cutter42 and through shims 43 and 44. In one position, as shown in Figs. 6and7, said shims-43 and 44 are at opposite sides of the bodies 42 of thecutters. In another position, that shown in Fig. 8, the bodies 42 of thecutters are brought I two shims 50, a

2g3t3"8 t5t5 V shownin Figt z passing through a side of and be 2'6.When-in such position across the tube an insurance is had against thepassage against the inner sides of {parts 40 ml both" shims '43 and areat the outer sides thereof The immediate cutter portionslisharpened attheir lower edges extend forwardly from the su'p porting member 36,coming in close proximity' at their front edges to the drill -|5 (Figs.1, hand As shown in Fig. 4, the lower cutting-edges 8). of the parts 45lie in substantially the same-horizontal plane with the lower end of thehollow paper drill l5.

It is evident that with the downward movement of the posts 1 and theaccompanying downward movement of all the parts carried thereby,

substantially V-shaped slot flout-between cut ters, when they arelocated more closely together, as in Fig. 7 is shown at 41. In Fig. 15the drilled the drill and thec'utters 4'5 rnove together; in a downwarddirection simultaneously drillingand slotting the paper sheets. Fig. 14the circular ,hole drilled by the drill is shown at and the hole is thesame as before but the slotllla' has its diverging sides more widelyseparated than in Fig. 14.

In Fig; 9 the holder 36a for the cutter has the same vertical slot 3'!for passage of the clamping screws 38 and the same ribs 3-9 to entertheguiding grooves at '35. The lower-portion of the memher 350, isvertically slotted for the reception of 'a cutter body 48 having aprojecting immediate cutter portion 49 and two shimsiil In Fig. thecutter is-shown at one-side of the slot with the shims 5!! betweenit"and "the opposite side. In. Fig. 11 the cutter is shown atsaicl'opposite side with the two shims at the other. side thereof.

and the accompanying cutter, the lowerJedge With the downwardmovement ofthe drill portion of the section 49f'being sharpened, a hole 46 will bedrilled and-aslit 5| madein the paper as shown in Fig. 16; Such slitisto' one side of a diameter of the hole 46 whichparallels'fsaid slit.

In a second op eration the drill will be removed and the cutter aloneoperated, whereupon asec-' 0nd slit will be cut through the paper spacedfrom but parallel to the first slit, 51, thereby leaving a .slot52having' parallel sides as shownin Fig. 1.7. If the cutter is 'locatedbetween the bemade. vA third form of cutterassembly maybe used with themachine forcutting "what is known as the Kalamazoo slots or recesses inthe edges of the paper at spaced apart pointsl Thisincludesl f asupporting body 36b, similarly slotted at for.

the attachment by means of theset s'crewsl38 and having a cutter 53, ofthe'shape best shown in Fig. 12, connected'with the supporting body andwith its loweredges sharpened and of a shape to make .asub'stantiallyrectangular slot or recess 54 (Fig. 18) whenthe'cutter is moved. down topassthrou'g'h the .sheetsi'of the pack. 5. In this case the drillwillnot be used. The'lower por of any articles downwardly through the tubeto the fan 29, such as toolsor the like which may be aroundlthe machinewhen used in various adjustments of the" niacin-ne'er ini ntefrchangingthe slotting assemblies: A vertical leg 58 is integralwith and extendsdownwardly from the slide support 51' at-the lower end of which an arm59 is pivota'l'lymounted and extends upwardly (Fig. l), carrying aroller 590 at its upper endto. pass through a'slfotin the plate 56whereby when the armswings' about its pivot the slide is movedhorizontally; The arm 59 is fixed to apivot pin 60 which, on theopposite side of the vertical support 5B1c'arriesashortgsubstantiallyh'orizontalarm Eton which la'relatively heavy weight62 of the -iorm" best shown in Fig. 2 is pivotally mounted, 'asat 63."The weight 6 2 is vertically slotted with a slot 6'4}. A rod' 65-connected with one of theposts Tektend's horizontally into the slot 61at" its end.

Oh the l-upward movement of the post I. under theinfltience'or thesprings 8,;rod 65 engaging against the weight 62' at the upper end ofslot 5 lifts'the weight to'the positionishown in Fig. 2,

turningthe arm59 a clockwise direction and therebymovin'g the plate 56-into and across the tube 26 tothe position "shown inFig'. 2. on thedownward movement of the post '1 when the drill and cutters are movedtoward the} sheet pack 5,

i rod 55 moves downwardly and the weight 6? follows it, so that bytlietime the drill and cutters 1 have reached the uppermost sheet of paperin the pack 5', the plate 56 has been moved soas to clear the tube "26.ThefJtube is then open for the downward passage of the pieces of paperwhich are cut from thev sheets of paper when the slotting takes place;But automatically on the 1'6? turn-upward movement of the drill ,to anupper position, the pl'atejfiis carried across the upper end 'portion ofthe tube 26; and it isjmoVed-to its outer position to clear the tubeonlyat the times when the drilling and cutting operations take place.This strticture'is' a 'safeguardand insursingle centrally located slitmay i ance against the dropping of undesired articles through the tubeto the rotating .fan 29 which, if it occurred, .inightd'amage the fan orthe-.motor 2'8 and which also Imightf be hard to recover. But ifanything drops down the tube only to the stop which is made byth e plate56, it is relatively easy to recover the same and without any danger of,damage. further object is to conserve powerfsince the ianis drivenmoreeasily when air is preVeIitedfrQm entering the tube, fTIfhe'pOweroperated machine of ,Figs. "19, 20, 21 and 22 is described as followst,

of tnerpot operated .m'achineare' mounted for a vertical reciprocation,intheirame of the mationof the body 3619 is recessed and a curved member55 secured in the upper portionthereof, as shown at Fig. 13, the frontedge of which comes to the rear inner cutting edgeof the cutter 53,'saidmember, 55 serving as a deflecting memher for the paper parts which arecut from the sheets and acting to move the same automath cally in arearward direction and direct them into the descending current of airpassing through the tube 26 and thence to and through the fan housing21. 7 y

A horizontal plateifi' is mounted for a sliding movement upon a guideway"51 in the upper part of the supporting casting 2 at one position, as

chine and are normally held in upper position by thesprings I06 whichare compressed on down-v ward movement 'of the posts during operation ofthe" machine. The head 6 and mechanism supportedthereby is fixed to theupper ends of the p'ostsf I05 as heretofore described. H

The posts, I05 are connected at their v lower ends by across bar I I3which; atone end, has a suqrt extension 1 M. A vertical rodfl'l5 isthread:

ed through the extension I It andmay be locked bythe: lock. nut shown inany position to which 1 it may be adjusted. Thecross bar H3 lies abovethe inner end "of an oil containing tank I Hi, the inner, chamber Illoiwhich is partly'filled with ,Thepiostsl I05, corresponding withthelposts 1 I oil-to provide a reservoir'of oil for thehydraulicoperation which will be later described. The tank has an open upper endcovered by a removable cover. At its rear portion a vertical cylinder H8is cast integral with the tank 6, the upper end being closed by aclosing head I I9 in which a suitable stuffing box is installed andthrough which a piston rod I20 passes, having a piston I2! at its lowerend within the cylinder H8, and at its upper end having a connection tothe bar II3 substantially midway between the posts I05.

A rotary. pump I22 is mounted to one side and adjacent the front of thetank H6 and has an inlet conduit I23 connecting its intake side with thetank II6 adjacent the bottom of said tank. From the outlet side of thepump a conduit I24 leads to the upper end portion of the cylinder I I8,emptying as at I25, into said cylinder above the piston I2I. Likewise,above the piston and connected with the cylinder H8 is a nipple I26connected with a relief valve I21 which is connected by a suitablenipple with a coupling I28.

The outer end of the coupling has a valve member I29 of substantiallycylindrical form connected therewith and extending outwardly therefrom,to the end of which is an outlet I30 having a central passagetherethrough.

The valve member I29 between its ends is provided with a transversepartition I3I. At one side of the partition toward the coupling I28holes I32 are made through the wall of the valve member, and similarhole I33 are made through said walls at the opposite side of thepartition I3I. Surrounding the valve member I29 is a housing made up oftwo sleeves I34 and I35 one threading into the other, said sleeveshaving inturned annular flanges at their outer ends so that the body ofthe housing made by the connected sleeves is spaced from the outer sidesof the valve member I29. Within the housing at each end thereof so as tobear against said annular flanges are packing rings I36 and I31, whichare held against said flanges by a coiled compression spring I38 betweenthe packing rings. Trunnions I39 are connected with the member I34 andextend in opposite .directions therefrom. A relatively heavy'coiledcompression spring I40 at one end bears against the end of the memberI34 tending to push it and the connected member I35 to the left, theopposite end of the spring bearing against an annular collar of thecoupling I28,

IA. lever I4! having a foot pedal I42 at its outer end, said pedal beinglocated at the front of the cabinet I and near the bottom thereof, ispivotally' mounted at its inner end to turn about a pivot rod I 43. Onsuch pivotal movement of the pedal in a downward direction it swings theupwardly extending arm I 44 in a counterclockwise directicn. A squareblock I45 i carried at the upper endof the arm I44. A coiled spring I46associated with the arm and the pedal I4I normally tends to liftthe-pedal to the upper position.

A shaft I41 extends through the tank II6 and is journaled for rotativemovement in the sides of the tank. Within the tank arms I48 secured tothe shaft extend upwardly and at their upper end portions are recessedor slotted .to receive the trunnions I39. At the outer end of the shaftI41 and between the tank H6 and a side of the cabinet I an arm I49 issecured extending downwardly and at its lower end having a pivotalconnection to the rear end of a bar I50. The bar I50 extends in aforward direction over the block I45 previously described. Said bar I50in front of theblock I45 is provided with a hardened" block' I5I at itsunderside against which the block I45 engages on depressing the pedalI42, thereby moving the bar I50 longitudinally in a forward 1 direction,turning the shaft I41 and removing the valve housing comprised of theparts I34 and I35 rearwardly or to the right, whereupon the packing atI36 covers the openings I33.

The pump I22 is driven by an electric motor I52 which through a seriesof belts I53 and reducing pulleys I54 drives the pump at a less speedthan the speed of rotation of themotor.

A lever I 55 is pivotally mounted at I 56 between its ends on a side ofthe tank N6; the rear end of the lever extending to and coming directlybeneath the lower end of the vertical rod H5. The front end of saidleverextends alongside the bar I50 to a position in front of the block I5Iand has a lateral projection I51 which comes underneath the front freeend of said bar I50.

When the machine is to be used for drilling paper, the sheets of papertobe drilled usually in a superimposed pack are placed on the table 3and against the back gauge 20; and usually an end gauge, not shown inthe present disclosure, is used to gauge the sheets at one of the sideedges thereof. Preparatory to drilling the electric motor I52 is startedin operation. It pumps oil, taking-it from the chamber II! of the tankIIB through the inlet pipe I23, and delivers it to the cylinder II8above the piston. So longas the pedal I42 is not depressed the oilpumped into the piston is carried out through the nipple I26, throughValve I2'I coupling I28 and into the valve member I29, passing outwardlythrough the openings I32 and then back into the valve member'through theopenings I 33 and out at the outlet, I30.

When the pedal I42 is depressed and the packing at I36 covers theopening at I33 in the valve member I29, there is no place for the oil togo except into the cylinder II8, whereupon the oil pumped into thecylinder above the piston I 2I causes a pressure upon the upper side ofthe piston, moving it downward and thereupon bringing the drill I5 intodrilling relation with the paper. The downward movement of the pistonI2I continues so long as oil is pumped into the cylinder II8 above thepiston and cannot escape until thelower end of the rod II5 engages thelever I55 and turns it in a clockwise direction. Such movement elevatethe projection I5I with a consequent elevation of the outer end of thebar I50 and disengagement of the block I5I from the block I45. When thisoccurs the spring I40 moves the outer housing consisting of parts I34and I35 back to the initial position. This restores the circulation ofoil through the openings I32 and'I33. The springs I06 elevate the postsI05 and the drill I5 and force the oil which is above the pistonoutwardly and into the tank I I6,

as is evident. The valve control of the flow of oil through the openingsI33 is operated substantially instantaneously so that when the drill hascompleted a drillin operation and reached the lower limit of thetravelwhich it should make it is stopped substantially instantly andstarted on its return to upper position as the rod II5 operatesthejlever I55 and stops any further downward movement of the piston I 2I.

The speed of downward movement of the piston I2I, posts I05 and thedrill may be regulated by setting the relief valve at I21.- Such reliefvalve is of conventional structure. It may be set to permit a limitedescape of oil, but not the full with reference to the drill.

pack including a, plurality of sheets of paper in.

3. machine for simultaneously boring holes in a pack of; paper sheetsand slotting said sheets from the'edge of thehole to theadjacent edge ofthe papercomprising, a paper pack support,

a drill, a drill head, slot cutting means disposed rearwardlyj of saiddrill'including a block having centrally spaced portions diverging awayfrom said drill, a knife'member'adapted to be secured s v to one of saidportions, and means, on said drill head ,for receiving said cutting;means whereby saidknife member will act upon thepaper simul- Itaneouslywith said drill.

superimposed relation, 'are very quickly and ac- 'curately processed andprovided with the desired shape or configuration of slot therein, mostof which include an inner portion of circular, form made by the drill,with lateral slots leading-from the circular openings to theadjacentedge; of the v a sheets of paper. The various slotting devices con- 4. Amachine of the class described comprising,

a paper pack'support, areciprocating drill head,

a substantiallyv shaped cutting attachment includinga block-having'aportion thereof cutout *to provide diverging sides, cutting meanssecured tosaid'jsides, and means on said drill head to adjustablyreceive said attachment, whereby said sisting of the supports 36,; 36aor 361) and the appropriate cutters secured thereto are"interchangeable. 'Theadjustment of the supporting block by means of theset screws 34 and the slots through which they pass, permits theaccurate adjustment of the cutters to desired positions The invention isdefined in; the

all forms of structure coming within their scope. 'Weclaim:

1. In a construction of the classdescribed, a vertically movable drillhead, 'a vertical drill 1 appended claims and is to be consideredcomprehensiveof drill head and. attachment will reciprocate to gether. r

- 5. The combination of elements defined in" claim 4, said last namedmeans including slots in said drill head and ribs in said block, saidribs adapted to fit into said slots, a slot in said block, and meansextending through said slot to adjustably secure said block tosaid drillhead.

,6. Ina machine of-the class described, a table for supporting a pack ofpaper sheets, a drill head,- means for movingsaid drill head and tabletoward and away. from each other, a rotatable hollow drill carriedby-said drill head, apaper cutting attachment secured to said drill headinmounted thereon for rotation,1 and a cutter attachment detachablysecured to said drill head comprising, a supporting block having avertical the slot thereof having a portion projecting forwardly'from theblock toward and in close proxim'ity' at its forward edge to said drilland having I i horizontal .plane with the cutting end of the drill.

2. In a machine of the class described,ga.drill head mounted forvertical movements, a drill rotatably mounted on said drill head, acutter'at tachment releasably connected to said drill head comprising; asupporting blockpsaid block being L'releasably secured by screws to said'drill head,

. slot, and a cutting blade secured to said block in v eluding afcutterhaving a sharpened lower edge. extending from closelyadjacent said drilloutwardly away; therefrom, a conduit extending away from, a location inproximity to said cutting attachment and means for inducting a draft or,air

, through saidconduit in a direction away from a sharpened edge lying insubstantially the same said cutting attachment. I

7. The elementsdefined inclaim 6, combined withfa movable gate in saidconduit and means for opening said gate on movement of the drill 1 headtoWard'said table and for closing said gate table.

and said block being vertically slottedjsaid slot thereinhaving inclinedsides,.a nda cutting blade located against each of the inclinedsid'esofsaid slot, and having cutter. portions extending in ting edges in frontof the block sharpened and lying in substantially the same horizontalplane with the cutting end of said dril1, sa id blades front of theblockwith their'frontfvertical edges in close proximityto the drill and'withtheir cut 3 converging toward each other toward said. drill,

as specified.

upon movement 8. Amacliine'ofthe-class described comprising, a paperpack support, a reciprocating drill head,

a cutting attachmentincluding a block having-a portion thereof cut outto provide diverging sides,

cutting means secured to said sides, andmeans on i said' drill head toadjustablyreceive said attachment, whereby said drill head andattachment will reciprocate together.

of the drill headiaway from said -JAMEsWESLEYLEE.

